Buggy code:
public class GenericMenuBarView extends Composite implements CourseClassesFetchedEventHandler , UnreadMessagesCountChangedEventHandler , UnreadMessagesPerThreadFetchedEventHandler , MenuBarView { Logger logger = Logger . getLogger ( GenericMenuBarView . class . getName ( ) ) ; interface MyUiBinder extends UiBinder < Widget , GenericMenuBarView > { } ClientFactory clientFactory ; private static GenericMenuBarView . MyUiBinder uiBinder = GWT . create ( GenericMenuBarView . MyUiBinder . class ) ; private static final String IMAGES_PATH = "skins//first//icons//menuBar//" ; private boolean visible = false ; @ UiField Label testEnvWarning ; @ UiField FlowPanel menuBar ; @ UiField Button btnFullScreen ; @ UiField Button btnProfile ; @ UiField Button btnHome ; @ UiField Button btnAdmin ; @ UiField Button btnNotifications ; @ UiField Button btnMessages ; @ UiField Button btnHelp ; @ UiField Button btnMenu ; @ UiField Button btnExit ; @ UiField Image imgMenuBar ; private KornellSession session ; private EventBus bus ; private boolean hasEmail ; private Label messagesCount ; private int totalCount ; private String imgMenuBarUrl ; private boolean isLoaded ; public GenericMenuBarView ( final ClientFactory clientFactory , final ScrollPanel scrollPanel ) { } private void addOffsets ( final ScrollPanel scrollPanel , Place place ) { } private void loadAssets ( ) { } private void showButtons ( Place newPlace ) { } private void showButton ( Button btn , boolean show ) { } public void display ( ) { } private boolean isProfileIncomplete ( ) { <START_BUG> return ( ( ( session . getCurrentUser ( ) . getInstitutionRegistrationPrefix ( ) . isShowContactInformationOnProfile ( ) ) && ( Dean . getInstance ( ) . getInstitution ( ) . isDemandsPersonContactDetails ( ) ) ) && ( Dean . getInstance ( ) . getInstitution ( ) . isValidatePersonContactDetails ( ) ) ) && ( StringUtils . isNone ( clientFactory . getKornellSession ( ) . getCurrentUser ( ) . getPerson ( ) . getCity ( ) ) ) ; <END_BUG> } static native void requestFullscreen ( ) { } @ UiHandler ( "btnFullScreen" ) void handleFullScreen ( ClickEvent e ) { } @ UiHandler ( "btnProfile" ) void handleProfile ( ClickEvent e ) { } @ UiHandler ( "btnHome" ) void handleHome ( ClickEvent e ) { } @ UiHandler ( "btnAdmin" ) void handleAdmin ( ClickEvent e ) { } @ UiHandler ( "btnExit" ) void handleExit ( ClickEvent e ) { } @ UiHandler ( "btnHelp" ) void handleHelp ( ClickEvent e ) { } @ UiHandler ( "btnMessages" ) void handleMessages ( ClickEvent e ) { } @ Override public void setPresenter ( Presenter presenter ) { } @ Override public boolean isVisible ( ) { } public void setVisible ( boolean visible ) { } private void updateUnreadCount ( ) { } @ Override public void onUnreadMessagesPerThreadFetched ( UnreadMessagesPerThreadFetchedEvent event ) { } @ Override public void onUnreadMessagesCountChanged ( UnreadMessagesCountChangedEvent event ) { } @ Override public void onCourseClassesFetched ( CourseClassesFetchedEvent event ) { } }

Fix:
return ( ( ( ( ( session . getCurrentUser ( ) . getInstitutionRegistrationPrefix ( ) ) == null ) || ( session . getCurrentUser ( ) . getInstitutionRegistrationPrefix ( ) . isShowContactInformationOnProfile ( ) ) ) && ( Dean . getInstance ( ) . getInstitution ( ) . isDemandsPersonContactDetails ( ) ) ) && ( Dean . getInstance ( ) . getInstitution ( ) . isValidatePersonContactDetails ( ) ) ) && ( StringUtils . isNone ( clientFactory . getKornellSession ( ) . getCurrentUser ( ) . getPerson ( ) . getCity ( ) ) ) ;